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5 lever mortice lock

Thinking of upgrading your door security? Getting a better deadbolt or padlock? Getting a new frame or better hinges? Not sure what brand or model to go with for your particular application? Need a recommendation? Feel free to ask for advice here!

5 lever mortice lock

Postby maz1 » 20 Apr 2014 4:56

Hi clever locksmiths , please can anyone tell me how to alter the 5 lever chubb 3k74 lock to make it more difficult for some one to pick it???
cheers Maz.
maz1
 
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Re: 5 lever mortice lock

Postby ARF-GEF » 29 Apr 2014 14:30

Put "teeth" on the surface where the levers meet the trunk-looking fixed bar. By teeth Imean a zig-zaggy edged surface.
To infinity... and beyond!
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Re: 5 lever mortice lock

Postby maz1 » 2 May 2014 13:15

Hi ARF-GEF,
Thank you for your responce , but sorry i do not get what you mean any chance of a sketch ?.
cheers maz.
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Re: 5 lever mortice lock

Postby GWiens2001 » 2 May 2014 14:20

Here are a couple examples of what ARF-GEF is talking about:

Image

Image
Gordon
Just when you finally think you have learned it all, that is when you learn that you don't know anything yet.
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Re: 5 lever mortice lock

Postby peterwn » 4 May 2014 3:47

ARF-GEF wrote:Put "teeth" on the surface where the levers meet the trunk-looking fixed bar. By teeth Imean a zig-zaggy edged surface.

They already have false anti-pick notches, or were you thinking of augmenting this with a series of 'V' notches to give a zig-zag surface.
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Re: 5 lever mortice lock

Postby ARF-GEF » 4 May 2014 14:56

I meant those, thank you very much Gordon :) Your pics are much better than what I could have sent :)

Yes I meant those. If they have those I think chances are it's a pretty decent lock. Anti pick notches usually are a sign of a bit of extra care from the manufacturer.
Other than those nothing obvious pops into my mind.
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Re: 5 lever mortice lock

Postby GWiens2001 » 4 May 2014 16:03

Those pictures came from a very old Yale lock. They certainly cared for what they made!

Gordon
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Re: 5 lever mortice lock

Postby maz1 » 5 May 2014 11:05

Thank you Gordon for them pictures that is very good ,
so if i put some zigzags on all the 5 levers that will make it more difficult for a lockpicker to open ?

Would anyone have any other ideas as to what can be done to make picking more difficult??.
Thank you and Cheers Maz.
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Re: 5 lever mortice lock

Postby GWiens2001 » 5 May 2014 12:14

Also cut/file grooves in the post that the levers work with. That will cause the levers and post to lock together. :)

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Re: 5 lever mortice lock

Postby peterwn » 11 Aug 2014 2:52

ARF-GEF wrote:I meant those, thank you very much Gordon :) Your pics are much better than what I could have sent :)

Yes I meant those. If they have those I think chances are it's a pretty decent lock. Anti pick notches usually are a sign of a bit of extra care from the manufacturer.
Other than those nothing obvious pops into my mind.

An anti-pick feature such as notches is a requirement if the lock is going to comply with British Standard 3621 for thief resistant locks.
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